package Thread;

import java.util.concurrent.Semaphore;

public class Demo43 {
    private static int count = 0;
    public static void main(String[] args) throws InterruptedException {
        Semaphore semaphore = new Semaphore(1);
         //线程1
        Thread t1 = new Thread(() -> {
            try {
                for(int i = 0 ; i < 50000 ; i++){
                    semaphore.acquire();
                    count++;
                    //释放
                    semaphore.release();
                }
            } catch (InterruptedException e) {
                throw new RuntimeException(e);
            }
        })   ;
        //线程2
        Thread t2 = new Thread(() -> {
            try {
                for(int i = 0 ; i < 50000 ; i++ ){
                    semaphore.acquire();
                    count++;
                    semaphore.release();
                }
            } catch (Exception e) {
                throw new RuntimeException(e);
            }
        }) ;

        t1.start();
        t2.start();
        t1.join();
        t2.join();

        System.out.println("count = "+ count);
    }
}
